Your bug report

#70236: Truncating only happening on 900 character long lines in *compilation* buffer

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 70236@debbugs.gnu.org.

-- 
70236: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=70236
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